Question

factorisation method
$2 {m}^{2} + 19m + 30 = 0$

Answer 1

$\: \: \: \: \: \: 2 {m}^{2} + 19m + 30 = 0 \\ \:or \: 2 {m}^{2} + 15m + 4m + 30= 0 \\ or \: m(2m + 15) + 2(2m + 15) = 0 \\ or \: (2m + 15)(m + 2) = 0 \\ now \\ (a) \: 2m + 15 = 0 \\ or \: \: \: \: m = - \frac{15}{2} \\ (b)m + 2 = 0 \\ or \: \: \: m = - 2$